Men attach a gondola with an inflated balloon at Holloman Air Force Base in New Mexico during Operation High Dive.

Operation High Dive carried out by the United States Air Force ( USAF ) for testing high altitude parachute descent at Holloman Air Force Base in New Mexico, United States. Aerial view of the AFB. An inflated balloon at the AFB. Men standing near the balloon. A gondola placed nearby is being attached to the balloon.